Home / 19,138.08-28,707.12-5,286.72

Finding the Fourth Proportional to 19,138.08, 28,707.12 and 5,286.72

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Solution

The fourth proportional to 19,138.08, 28,707.12 and 5,286.72 is: 7,930.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.08 : 28,707.12 = 5,286.72 : x
  2. Step 2: Convert to fraction form
    19,138.08/28,707.12 = 5,286.72/x
  3. Step 3: Cross multiply
    19,138.08x = 28,707.12 × 5,286.72
  4. Step 4: Simplify right side
    19,138.08x = 151,766,505.45
  5. Step 5: Solve for x
    x = 151,766,505.45/19,138.08
  6. Step 6: Final answer
    x = 7,930.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.